19904300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:339

約数の個数: 72

約数和(自身を含む): 47465712

約数和(自身を除く): 27561412

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 61, 65, 100, 122, 130, 244, 251, 260, 305, 325, 502, 610, 650, 793, 1004, 1220, 1255, 1300, 1525, 1586, 2510, 3050, 3172, 3263, 3965, 5020, 6100, 6275, 6526, 7930, 12550, 13052, 15311, 15860, 16315, 19825, 25100, 30622, 32630, 39650, 61244, 65260, 76555, 79300, 81575, 153110, 163150, 199043, 306220, 326300, 382775, 398086, 765550, 796172, 995215, 1531100, 1990430, 3980860, 4976075, 9952150, 19904300]

約数ペア:

[(1, 19904300), (2, 9952150), (4, 4976075), (5, 3980860), (10, 1990430), (13, 1531100), (20, 995215), (25, 796172), (26, 765550), (50, 398086), (52, 382775), (61, 326300), (65, 306220), (100, 199043), (122, 163150), (130, 153110), (244, 81575), (251, 79300), (260, 76555), (305, 65260), (325, 61244), (502, 39650), (610, 32630), (650, 30622), (793, 25100), (1004, 19825), (1220, 16315), (1255, 15860), (1300, 15311), (1525, 13052), (1586, 12550), (2510, 7930), (3050, 6526), (3172, 6275), (3263, 6100), (3965, 5020)]